In California, a recent ruling appears to define making false comments on someone else's Facebook as identity theft. Rolando, a juvenile resident, accessed the account information for another person, and like any good prankster, couldn't just let it go to waste. As a result, he logged onto the account, impersonated the rightful owner and made some public statements proclaiming a certain fondness of fellatio. As a result, he was charged with identity theft. Now, if you've had one of your "friends" do the same thing to you, as you likely have, identity theft may seem like a little bit of a jump, so let's break down the specifics.
It all started when Rolando received an unsolicited text message that contained the victim's email password. From there, he presumably reset the victim's Facebook password by email and then logged onto the Facebook account for trolling purposes. A far cry from changing someone's "sexual preference" because they used your computer and forgot to log off.
As a result, Rolando wound up being charged under a California statute that applies to someone who:
...willfully obtains personal identifying information [of the victim and] uses that information for any unlawful purpose, including to obtain, or attempt to obtain, credit, goods, services, real property, or medication information.